| abstract |
Disclosed by the present invention are a reversible self-repairing epoxy resin and a preparation and recovery remoulding method therefor. Under the catalysis of potassium iodide, the acetate solution of 2-mercaptoacetic acid is oxidized by 30% hydrogen peroxide to obtain 2,2'-dithioglycolic acid; performing dehydration and cyclization on the 2,2'-dithioglycolic acid by means of anhydride to obtain 2,2'-dithioglyoxalic anhydride; and mixing the 2,2'-dithioglyoxalic anhydride with methylhexahydrophthalic anhydride in proportion and after curing with epoxy resin added in, a reversible self-repairing epoxy resin is obtained. According to the present invention, the composition of a dynamic cross-linked network and a permanent cross-linked network in an epoxy resin is changed, thus reversible self-repairing and recovery remoulding of the epoxy resin are realized, and meanwhile, excellent heat resistance is obtained and the mechanical property is improved. The preparation method for the reversible self-repairing epoxy resin provided by the present invention has the advantages of wide source of raw materials, simple process, good applicability and strong practicability of products. |